https://wccftech.com/windows-10-version-21h1-build-19043-867-kb5000802-beta-channel/

Windows 10 version 21H1 Build 19043.867 (KB5000802) is now available for Insiders in the Beta Channel. This update is available for those Insiders who are currently testing the recently announced version 21H1. Today's security update brings the following quality improvements:

Microsoft introduced Windows 10 version 21H1 last month in February, making it the second consecutive minor feature update following the release of version 20H2 back in October 2020. The Windows maker is expected to release a major update later in the year. For now, Insiders in the Beta Channel can get their hands on this upcoming version of Windows 10, which will be installed like a cumulative update on devices running last year's versions 20H2 and 2004.